Rock, the house: solid roof over a Mexican home

Benito Hernandez stands outside his home near San Jose de Las Piedras in Mexico's northern state of Coahuila on January 16. For over 30 years, Hernandez, his wife Santa Martha de la Cruz Villarreal and their family have lived in a sun-dried brick home with a huge 130-foot-diameter rock used as a roof. The dwelling is found close to the town of San Jose de Piedras, a remote community located in the arid desert of Coahuila, about 50 miles from the border with Texas.

Daniel Becerril / Reuters

Lucero Hernandez, granddaughter of Benito Hernandez and his wife Santa Martha de la Cruz Villarreal, stands in the doorway of her family's home near San Jose de Las Piedras in Mexico's northern state of Coahuila.

Daniel Becerril / Reuters

Santa Martha de la Cruz Villarreal stands nearby as her husband Benito Hernandez pours hot water into a cup at their home.